Vascular System & Viscera Pu, Acc 8952Pu

Автор: Acc 8952Pl1.5
Название: Vascular System & Viscera Pl1.5
ISBN: 1587790769 ISBN-13(EAN): 9781587790768
Издательство: Lippincott Williams & Wilkins
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Цена: 21170.00 T
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Автор: Thomas B?r
Название: The Vascular System of the Cerebral Cortex
ISBN: 3540096523 ISBN-13(EAN): 9783540096528
Издательство: Springer
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Цена: 93160.00 T
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Описание: A vascular system consists of a supplying arterial and a draining venous part which are connected by a terminal vascular network. The arterial segment can be characterized according to the structural features of the vessel wall. However, it is sometimes diffi- cult to distinguish the capillary from the postcapillary vessels on the basis of structural features alone. On the other hand, physiologic qualities such as permeability can hard- ly be associated with an equivalent histologic pattern of the vessel wall (lllig 1961; Rhodin 1967, 1968; Hauck 1971; Westergaard 1974). A defmition of a vascular seg- ment based on biologic significance should combine morphological and functional qualities of the vessel walls. During the ontogeny of the mammalian organism a variety of vascular patterns (e. g., distribution of arteries and veins, arrangement of the capillaries) has been formed typical of each organ (Wolff et al. 1975; Baez 1977). The capillaries connect the feed- ing arterioles and the collecting venules in two different ways according to the branch- ing pattern of the terminal vessels (Hauck 1975, Wolff et al., 1975). The arterioles and venules are directly connected by capillary segments. Consequently a terminal vessel called arteriovenous (a-v) capillary results, or a closely meshed capillary network is de- veloped which connects arterioles and venules by a variable number of small capillary branches arranged parallel to the preexisting a-v capillary.